I use panniers, front and rear. I prefer them to pulling a trailer but it is an individual choice. You need good racks to carry any weight at all. I like Tubus racks, but there are other good ones. Cromoly racks will be stronger than aluminum, and more durable.

For panniers, there are lots of options, but the best are probably Ortlieb and Arkel. The Ortliebs are waterproof and generally are one big compartment. The Arkels have one large compartment and lots of others for better organization. It's personal choice as far as what works for you.

I use Ortliebs and then use smaller camping bags inside for organization. I have ridden through lots of rain with them and everything stays dry (except me of course). You can check out some options at Adventure Cycling. They have tons of knowledge about touring equipment.

Adventure Cycling

Greg